PROC SURVEYREG Statement

The SURVEYREG Procedure

PROC SURVEYREG Statement

PROC SURVEYREG < options >;

The PROC SURVEYREG statement invokes the procedure. You can specify the following options in the PROC SURVEYREG statement.

ALPHA= $\alpha$

sets the confidence level for confidence limits. The value of the ALPHA= option must be between 0.0001 and 0.9999, and the default value is 0.05. A confidence level of $\alpha$ produces $100(1 - \alpha)$ % confidence limits. The default of ALPHA=0.05 produces 95% confidence limits. If $\alpha$ is between 0 and 1 but outside the range of 0.0001 to 0.9999, the procedure uses the closest range endpoint. For example, if you specify ALPHA=0.000001, the procedure uses 0.0001 to determine confidence limits.

DATA=SAS-data-set

specifies the SAS data set to be analyzed by PROC SURVEYREG. If you omit the DATA= option, the procedure uses the most recently created SAS data set.

RATE=value $\, | \,$ SAS-data-set

R=value $\, | \,$ SAS-data-set

specifies the sampling rate as a positive value, or specifies an input data set that contains the stratum sampling rates. The procedure uses this information to compute a finite population correction for variance estimation. If your sample design has multiple stages, you should specify the first-stage sampling rate, which is the ratio of the number of PSUs selected to the total number of PSUs in the population.

For a nonstratified sample design, or for a stratified sample design with the same sampling rate in all strata, you should specify a positive value for the RATE= option. If your design is stratified with different sampling rates in the strata, then you should name a SAS data set that contains the stratification variables and the sampling rates. See the section "Specification of Population Totals and Sampling Rates" for details.

The value in the RATE= option or the values of _RATE_ in the secondary data set must be positive numbers. You can specify value as a number between 0 and 1. Or you can specify value in percentage form as a number between 1 and 100, and PROC SURVEYREG will convert that number to a proportion. The procedure treats the value 1 as 100%, and not the percentage form 1%.

If you do not specify the TOTAL= option or the RATE= option, then the variance estimation does not include a finite population correction. You cannot specify both the TOTAL= option and the RATE= option.

TOTAL=value $\, | \,$ SAS-data-set

N=value $\, | \,$ SAS-data-set

specifies the total number of primary sampling units in the study population as a positive value, or specifies an input data set that contains the stratum population totals. The procedure uses this information to compute a finite population correction for variance estimation.

For a nonstratified sample design, or for a stratified sample design with the same population total in all strata, you should specify a positive value for the TOTAL= option. If your sample design is stratified with different population totals in the strata, then you should name a SAS data set that contains the stratification variables and the population totals. See the section "Specification of Population Totals and Sampling Rates" for details.

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